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Finding the Fourth Proportional to 1,309,985.86, 1,964,978.67 and 363,356.62

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Solution

The fourth proportional to 1,309,985.86, 1,964,978.67 and 363,356.62 is: 545,034.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309,985.86 : 1,964,978.67 = 363,356.62 : x
  2. Step 2: Convert to fraction form
    1,309,985.86/1,964,978.67 = 363,356.62/x
  3. Step 3: Cross multiply
    1,309,985.86x = 1,964,978.67 × 363,356.62
  4. Step 4: Simplify right side
    1,309,985.86x = 713,988,007,903.30
  5. Step 5: Solve for x
    x = 713,988,007,903.30/1,309,985.86
  6. Step 6: Final answer
    x = 545,034.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.